from the info i got around here and from testing Blindwrite 4.5.3 you will need to have a Premium drive and also firmware 1.03 to make a perfect backup of SecuRom 4.8
i tried firmwares 1.01 and 1.02 but both failed, backups didn't work properly.
updated to 1.03 firmware and made a backup and it works perfect.
pretty sure you need a Premium drive for reading and burning SecuRom 4.8
not sure on this though, i could be wrong.